Tool retainer



May 1, 1923.

S. OLDHAM rITOOL RETAINER Original Filed April l5, 1920 Patented May l, 1923.

SAMUEL OLDHAM, 0F PHILADELPHIA, PnNNsvL'vANIA, AssIGNoR 'ro GEORGE OLDHAM AND soN COMPANY, or PHILADELPHIA, PENNSYLVANIA, 4A oon- PORil-,LTION OF PENNSYLVANIA.

TOOL RETAINER. y

Application led April v15, 1920, Serial No. 374,116. Renewed September 99, 1922. Serial No. 591,398.

To all whom t may concern:

Be it known that SAMUEL OLDHAM, a citizen of the United States. residing at Philadelphia, in the county oi' Philadelphia and State of Pennsylvania, has invented certainA new and useful Improvements in Tool Retainers, of whichl the 4following is a specifica-- tion. l

This invention relates to an improved tool retainer for holding working tools at the operating ends of pneumatically-operated hammers. 7 K Y Various forms of clips have heretofore been provided to ellect a loose coupling of 1:5 the workingtoolwith the end of the hammer-barrel and the simplest of these forms which have come into commercial use are those which springvinto engagement with V,both the barrel and the working-tool.-y ln 2o practice, these spring clips seldom remain in place and are readily shot from the end of the barrel when the percussion plunger strikes the working-tool while the latter is withdrawn from the work. This displacement of the clip results from the fact that 'the clips are usually of the split-band type "to enable both ends to be sprung as they are snapped into engagement with the barrel and the tool and such bands will as readily spring to disengage as they the barrel and tool.

My invention has for its object to provide an improved construction of tool-retainer whereby the tendency ofk the working-tool to pass fromfone end of the retainer will cause the'other end of the retainer to more closely clamp thehammer-barrel. Y' Theinvention is illustrated in the .accompanying drawing, wherein,- i

retainer in place to couple the same together..

Fig. 2 illustrates the end of the hammerbarrelland the improved retainerf-A-the latter having a position to enable it to be attached to or detached fromJ the barrel.

Fig. 3 shows the detached retainer in sidey elevation, vand View..

will to engage drieal coupling which tapers in a yvertical Fig. 1 shows the lower end of a' hammerbarrel, the, working-tool kand the improved. y,whereby to form a plurality .oisyielding Fig 4 illustrates A the-same ltop or kplan- Referring now tof the kdrawing-,the numeral 5, designates the operating or tool-end upper shoulder 7 and a lower shoulder 8 55 j thereon. From the lower shoulder 8 down, the barrel 1n this instance, isftapered to f form'` anozZle-like lower end 9.

The interior ofthe barrel is of thesusual and well-known form with a passage there- 60 work, such for. example as' a chisel.

In the present instance this tool is illus 70 trated as. having a head 11; two spaced-l apart annular shoulders 12 and 13 whereby to form between them a reduced'neck 14, and ashank 15 which enters the nozzle-end 9, of the barrel as shown in broken lines in 75 Fig. 1 of the drawing.

.The present invention is designed to Y loosely'v couple the rivet-set or working-tool 10, with thefbarrel'of the pneumatic hammer so as to `retain the tool in position but permit it to have longitudinal movement with respect to the barrel-end. i

yThe retainer comprises twosemi-circular members v16 and l17 respectively which have l ends 18, that are lapped and pivotally conneeted,l as for example, by means .of rivets 19'.v When thusvriveted together the two connected members form a two` part cylindirection. Y Af i At the largerv end, each retainer member is provided with an inturned segmental flange l2O, vwhile .atthe smaller end each member is f provided with vertical notches 21--22 lprongs v23ealch vhaving an inwardly-proj ects ing'shouldel'. 24: thereon, for a purpose'that will presently be explained.v i e Inuthegpresent instance l have provided the-lappedends of the retainer `members with locking means whereby to hold thetwo members in a normal operating position i such as they assumepwhen in place on the end of ,the tool-barrel..V Y As illustrated in Figs. 152 and 4 of the drawing the locking means comprises an outwardlyprojecting bumper lug 25', onthe vupper' and lower edges fof the underla'ppilg end of the members both above and below the pivot 19, and a bump or lug on the upper and lower edges of the overlapping end of the members whereby to produce a cavity or recess 26, at they inner tace thereof. Thesev projections and recesses on the underlapping and overlapping ends of' the members are so located with respect to the pivot 19, that when the two members are rocked on said pivot so as to bring the lugs 25 and recesses 26 into alinement, the two may snap into locking engagement and thereby hold the members in the engaging position, as' will presently be more fully explained.

The operation of attaching the coupling is best illustrated in Fig. 2, of the. drawing wherein it will be seen that the two members have been rocked on the pivot 19, so as to draw or contract the lower prong-end 23, thereby reducing the diameter of said lower end while spreading or expanding the upper flanged-ends to increase the diameter of the latter between the inturned-flanges 20 on the two members.

Having thus spread the upper flangedends of the two members the latter end may be fitted around and in alinement with the groove 6 on the hammer-barrel whereupon by rocking the members on the pivot 19, the upper flanged ends may be contracted until the flanges 20, project into the annular groove 6 and lock the coupling or retainer in place on the end of the barrel. Upon completing this contracting operation, the lugs 25, and recesses 26 will be. brought into engagement and the two members thereby locked in the retained position on the barrel.

The tool 10, may then be inserted in the barreL-the shank-end 15, passing up freely through the yielding of prongs 23, andv the latter then yielding and spreading outwardly as the upper shoulder 13, is forced past the prongs. When the upper shoulder 13., has passed the yielding prongs 23. the latter will close or contract about the reduced neck 14, of the tool. between the lower shoulder 12 and the-upper shoulder 113. so that the tool may have a longitudinal movement equal to the distance between the shoulders 12-13 but will be limited in such movement b v said shoulders.

Tt will be noted that any tendency of the tool to force its way outwardly past the yielding prongs 23. will cause shoulder 13, to press outwardly on the prong-shoulders 24., and therebyY tend to further contract the upper flanged ends of the members` and increase the grip, 0f the flanges 20. about the grooveand above the lower shoulder` 8, on

Vthe nozzle-end of the barrel.

Having described my invention, 1 claim 1. A "working-.tool retainerv Jfor pneumatie-toets.'Sed"'1:etaiu@r Comprising; elll-v aerpivpeuy-c las van flange-means at the upper end of the connected segments and yielding means at the lower end thereof said segments being capable of rocking on their pivotV connections whereby to move the Hange-means toward or from each other.

2. A working-tool retainer for pneumatic tools said retainer being composed of a plurality of pivoted-together segments with flange means carried by the-segments above the pivot means and with yielding means circumferentially arranged on the segments below said pivot-means whereby the spreading of the lower yielding means will more the upper flange-means toward each other. l

3. A lworlfring-tool retainer for pneumatic tools said retainer comprising a plurality of segments with the end of one segment lapping the end 0f the next segment 'and the lapped portions of the segments.I

being' pivotally connected whereby toform an annular retainer and said retainer having inwardly projecting engagingv devices both above and below the pivots.

4. A working-tool retainer matic tools comprising a plurality of segments larger at one end than the other and each having an inturned flange at its larger end and an inwardly-projecting shoulder near its smaller end, means for pivotally. connecting the segments between their larger and smaller ends whereby when the smaller ends are drawn together the larger ends will be spread apart. i

5. A working-tool retainer' 'for pneumatic tools comprising a plurality Otsegments each having both ends circumferentially pivoted to another segment and each segment having an inturned flange at its upper edge above the pivots and a yieldingY prong at its lower end below the pivots.

V6. .t working-tool retainer for y pneu-` matic tools comprising a plurality of segmental members cach member havingy an end that laps and is pivotally connected to for pneuanother member-end and each member below its pivot being notched and each of, said members being provided with a. circumferential inturned flange above its pivot and an` inwardly-projecting shoulder below its pivot.

7. A, working-tool retainer 'for pneumatic tools comprising a plurality segmental members whose ends are pivotally connected and each member being largerat the top than the bottom edge-the larger edge of each member being provided with an inwardly-extending flange and below `the pivots and near the smallerl edge each member having an inwardly-extending shoulder whereby when the shouldered .portiers 0f the members are centr'actedk the flanged upper por-ticas Will be swung sutra-fr?? "8.; A Working-*2.901 retainer" tot resumatic ltools comprising a plurality of segmental members having lapped and pivotally-conneoted ends with inwardly-extending engaging means above and below the pivots and looking means on the lapped ends adj aeent to the pivots. y

9. A working-tool retainer for pneumatic tools comprising a plurality of seg mental members having 4lapped and pivotally-.conneoted ends with inwardly-extending engaging means above and below the y pivots and looking means on the lappedends of the members both above and below'the said pivots. Y.

10. A working-tool retainer for pneumatic tools comprising two segmental mem'- bers together formingV a circular retainer said members being permanently pivoted' above its pivot connections and an inturned shoulder below its pivotjoonneetions and at y 'said shoulders the members being 'formed to',

yield.

end and yielding meansnear the lower end' said members being pivotallyy connected at a plurality of points around their o iroum-f,

ference.

In testimony whereof IaIX myA signature. 35

. SAMUEL oLDHAM.

11. The combination with a Cylinderl or 25 barrel having a locking groove thereon, olal removable working tool insertable inthe end a of said barreland provided with anexteror shoulder, and a retainer comprising meml bers with ,inturned shoulders atrtlie upper. 30` 

